Giacobini-Zinner (21P)

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2026-03-24 (JD 2461123.5)
Eccentricity (e)0.7111070000
Semi-major axis (a)3.4907387856 AU
Inclination (i)32.05900000°
Long. of Asc. Node (Ω)195.29460000°
Arg. of Perihelion (ω)172.93950000°
Mean Anomaly (M)0.00000000°
Mean Motion (n)—°/day
Perihelion dist (q)1.00845000 AU
Aphelion dist (Q)5.97302757 AU
Orbital Period6.52192841 yr
Physical Parameters
H (abs. magnitude)9.00
G (slope)6.00
Orbit Solution
SourceMPC
Solution Date—
RMS Residual—″
Uncertainty—
Orbit TypeP
MOID0.010867 AU
Observations Used—
Oppositions—
Arc Total—
First Observation Used—
Last Observation Used—
Observations (7431)
Date Type RA Dec Mag Band Observatory
1985-06-25 08:44:33 A 21 51 50.69 +46 22 54.2 – – 691
1985-06-25 21:18:55 A 21 53 27.91 +46 39 35.7 – – 046
1985-06-25 21:24:04 A 21 53 28.51 +46 39 45.6 – – 046
1985-06-26 21:41:53 A 21 56 39.23 +47 12 11.2 – – 186
1985-06-26 21:51:52 A 21 56 40.41 +47 12 20.9 – – 186
1985-06-26 23:03:08 A 21 56 50.23 +47 13 55.0 – – 069
1985-07-01 06:46:49 A 22 11 27.04 +49 30 10.9 – – 657
1985-07-03 08:54:55 A 22 19 09.21 +50 34 38.1 – – 657
1985-07-03 20:40:45 A 22 21 01.81 +50 49 31.5 – – 555
1985-07-03 20:53:56 A 22 21 03.73 +50 49 47.3 – – 555
1985-07-04 06:48:55 A 22 22 39.86 +51 02 19.9 – – 657
1985-07-05 07:47:54 A 22 26 47.54 +51 33 43.3 – – 657
1985-07-05 21:11:56 A 22 29 03.44 +51 50 21.7 – – 555
1985-07-05 21:23:42 A 22 29 05.33 +51 50 32.6 – – 046
1985-07-05 21:28:07 A 22 29 06.09 +51 50 37.9 – – 046
1985-07-05 21:36:21 A 22 29 07.71 +51 50 53.4 – – 555
1985-07-05 21:47:40 A 22 29 09.43 +51 51 06.3 – – 555
1985-07-05 22:37:11 A 22 29 17.85 +51 52 09.1 – – 555
1985-07-05 23:47:16 A 22 29 29.74 +51 53 38.1 – – 555
1985-07-05 23:49:53 A 22 29 30.34 +51 53 38.3 – – 494
1985-07-06 00:32:43 A 22 29 37.54 +51 54 32.0 – – 494
1985-07-06 00:41:13 A 22 29 39.02 +51 54 42.9 – – 494
1985-07-06 06:19:09 A 22 30 37.26 +52 01 36.4 – – 657
1985-07-06 22:29:35 A 22 33 26.07 +52 21 30.7 – – 555
1985-07-06 22:49:37 A 22 33 29.57 +52 21 55.8 – – 555
1985-07-06 23:10:35 A 22 33 33.15 +52 22 22.6 – – 555
1985-07-06 23:29:35 A 22 33 36.50 +52 22 46.1 – – 555
1985-07-06 23:48:50 A 22 33 39.85 +52 23 10.9 – – 555
1985-07-07 00:00:50 A 22 33 41.96 +52 23 25.4 – – 555
1985-07-07 07:01:43 A 22 34 56.99 +52 31 53.5 – – 657
1985-07-07 14:17:30 A 22 36 15.34 +52 40 45.4 – – 893
1985-07-07 14:21:59 A 22 36 15.77 +52 40 51.2 – – 893
1985-07-07 20:37:56 A 22 37 23.55 +52 48 24.2 – – 114
1985-07-07 20:49:16 A 22 37 25.78 +52 48 38.1 – – 114
1985-07-08 06:23:49 A 22 39 10.27 +53 00 07.2 – – 657
1985-07-08 15:57:29 A 22 40 55.91 +53 11 39.0 – – 893
1985-07-08 22:36:02 A 22 42 10.23 +53 19 27.2 – – 046
1985-07-08 22:40:28 A 22 42 11.00 +53 19 32.9 – – 046
1985-07-09 07:01:50 A 22 43 45.37 +53 29 24.0 – – 657
1985-07-09 18:43:17 A 22 45 59.37 +53 43 12.0 – – 186
1985-07-09 18:48:16 A 22 46 00.52 +53 43 18.3 – – 186
1985-07-09 19:58:58 A 22 46 13.56 +53 44 41.4 – – 186
1985-07-10 19:35:13 A 22 50 51.13 +54 11 57.2 – – 186
1985-07-10 21:17:55 A 22 51 11.41 +54 13 50.2 – – 024
1985-07-10 22:15:35 A 22 51 22.63 +54 14 57.7 – – 024
1985-07-10 22:26:17 A 22 51 24.75 +54 15 10.7 – – 046
1985-07-10 22:28:57 A 22 51 25.30 +54 15 12.9 – – 046
1985-07-10 23:44:37 A 22 51 40.11 +54 16 41.8 – – 555
1985-07-11 00:01:22 A 22 51 43.41 +54 17 01.7 – – 555
1985-07-11 00:14:55 A 22 51 46.65 +54 17 16.8 – – 491